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udf: Fix extension of the last extent in the file

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[ Upstream commit 83c7423d1eb6806d13c521d1002cc1a012111719 ]

When extending the last extent in the file within the last block, we
wrongly computed the length of the last extent. This is mostly a
cosmetical problem since the extent does not contain any data and the
length will be fixed up by following operations but still.

Fixes: 1f3868f06855 ("udf: Fix extending file within last block")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jan Kara
2022-12-21 17:45:51 +01:00
committed by Greg Kroah-Hartman
parent dc1bc90397
commit 0dca7375e2
1 changed files with 1 additions and 1 deletions
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fs/udf/inode.c
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@@ -599,7 +599,7 @@ static void udf_do_extend_final_block(struct inode *inode,
*/ */
if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK))
return; return;
added_bytes = (last_ext->extLength & UDF_EXTENT_LENGTH_MASK) - new_elen; added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
last_ext->extLength += added_bytes; last_ext->extLength += added_bytes;
UDF_I(inode)->i_lenExtents += added_bytes; UDF_I(inode)->i_lenExtents += added_bytes;